On Skin States: Temporal Drift, Reproducibility, Comparability, and Identity Under Temporal Continuity
To speak of skin states implies the possibility of their comparison.
Comparison presupposes conditions under which skin states can be treated as identical. These conditions often remain implicit, although they determine which differences appear relevant and which are regarded as negligible.
Skin does not exist independently of time. Its states are embedded in continuous processes that generate subtle shifts even in the absence of visible events.
Temporal drift, in this sense, does not describe abrupt change but an ongoing modulation within tissue. Differences emerge not necessarily as new states, but as gradual displacements.
Such displacements do not inherently dissolve a skin state. They alter, however, the basis upon which states are compared. Comparability therefore cannot be assumed; it depends on the criteria under which identity is attributed.
Reproducibility appears under these conditions less as an intrinsic property of the skin than as a relation between defined assumptions of equality. It presupposes stable comparison rules rather than fully stable states.
Drift thus concerns primarily the basis of comparison. A skin state may be regarded as persisting while the conditions under which it is considered identical shift imperceptibly.
Identity, under temporal continuity, is not directly observed but established through defined criteria. Reproducibility accordingly appears not as a fixed characteristic of skin, but as a function of the equality conditions under which states are held comparable.